package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * desc
 *
 * @author wkh
 * @date 2024/6/15 15:52
 */
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private JwtProperties jwtProperties;
    // 微信登录接口
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    /**
     * 用户微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public UserLoginVO Login(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());
        // 判断openid是否为空
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        // 判断是否为新用户
        User user = userMapper.getByOpenid(openid);

        // 自动完成用户注册
        if (user == null) {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        // 生成jwt令牌
        Map<String, Object> map = new HashMap<>();
        map.put(JwtClaimsConstant.USER_ID, user.getId());
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), map);

        // 封装返回结果
        UserLoginVO userLoginVO = UserLoginVO.builder()
                .id(user.getId())
                .openid(openid)
                .token(token)
                .build();

        return userLoginVO;
    }

    // 调用微信登录接口，获取openid
    public String getOpenid(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String response = HttpClientUtil.doGet(WX_LOGIN, map);

        // 解析响应结果
        JSONObject jsonObject = JSONObject.parseObject(response);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
